1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* (C) 2016 by Holger Hans Peter Freyther
* (C) 2016 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>
#include <openbsc/mgcp_transcode.h>
#include <openbsc/debug.h>
#include <osmocom/core/write_queue.h>
#include <sysmocom/femtobts/trau.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
static const struct value_string trau_names[] = {
{ Trau_PrimId_GetCapReq, "Trau_GetCapReq" },
{ Trau_PrimId_GetCapCnf, "Trau_GetCapCnf" },
{ Trau_PrimId_AllocChanReq, "Trau_AllocChanReq" },
{ Trau_PrimId_AllocChanCnf, "Trau_AllocChanCnf" },
{ Trau_PrimId_FreeChanReq, "Trau_FreeChanReq" },
{ Trau_PrimId_SetupChanReq, "Trau_SetupChanReq" },
{ Trau_PrimId_SetupChanCnf, "Trau_SetupChan_Cnf" },
{ Trau_PrimId_ApplyReq, "Trau_ApplyReq" },
{ Trau_PrimId_ApplyCnf, "Trau_ApplyCnf" },
{ 0, NULL },
};
enum {
STATE_NONE,
STATE_ALLOCATED,
STATE_BROKEN,
};
struct dsp_transcode_chan {
int queue_id;
int state;
struct llist_head queue;
};
struct dsp_transcode_mgr {
/* FDs for DSP->ARM, ARM->DSP of the trau queue */
struct osmo_wqueue trau_a2d;
struct osmo_fd trau_d2a;
/* All the channels for transcoding */
struct dsp_transcode_chan chans[TRAU_MAX_CHANNEL];
};
static struct dsp_transcode_mgr g_dsp;
static int trau_arm2dsp_cb(struct osmo_fd *fd, struct msgb *msg)
{
int rc;
rc = write(fd->fd, msg->l2h, msgb_l2len(msg));
if (rc != msgb_l2len(msg)) {
LOGP(DMGCP, LOGL_ERROR,
"Failed to write frame to DSP %d/%d%s\n",
rc, errno, strerror(errno));
return -1;
}
return 0;
}
static void dispatch_trau(struct dsp_transcode_mgr *mgr, struct Trau_Prim *trau)
{
switch (trau->id) {
case Trau_PrimId_AllocChanCnf:
break;
//case Trau_PrimId_FreeChanCnf:
// this doesn't exist but should
}
}
static int trau_dsp2arm_cb(struct osmo_fd *fd, unsigned int what)
{
struct Trau_Prim trau;
int rc;
if (!(what & BSC_FD_READ)) {
LOGP(DMGCP, LOGL_ERROR,
"Activated for not read: %u\n", what);
return -1;
}
rc = read(fd->fd, &trau, sizeof(trua));
if (rc != sizeof(trau)) {
LOGP(DMGCP, LOGL_ERROR,
"Failed to to read trau reply.\n");
return -1;
}
dispatch_trau(&g_dsp, &trau);
return 0;
}
int mgcp_transcoding_dsp_init(void)
{
int i;
memset(&g_dsp, 0, sizeof(g_dsp));
for (i = 0; i < ARRAY_SIZE(g_dsp.chans); ++i)
INIT_LLIST_HEAD(&g_dsp.chans[i].queue);
osmo_wqueue_init(&g_dsp.trau_a2d, 20);
g_dsp.trau_a2d.bfd.data = &g_dsp;
g_dsp.trau_a2d.write_cb = trau_arm2dsp_cb;
g_dsp.trau_a2d.bfd.fd = open("/dev/msgq/trau_arm2dsp", O_WRONLY);
if (g_dsp.trau_a2d.bfd.fd < 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to open arm2dsp queue: %d/%s\n",
g_dsp.trau_a2d.bfd.fd, strerror(errno));
return 1;
}
g_dsp.trau_d2a.data = &g_dsp;
g_dsp.trau_d2a.cb = trau_dsp2arm_cb;
g_dsp.trau_d2a.fd = open("/dev/msgq/trau_dsp2arm", O_RDONLY);
if (g_dsp.trau_d2a.fd < 0) {
close(g_dsp.trau_a2d.bfd.fd);
return 2;
}
return 0;
}
|
